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This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Statistical Quality Control knowledge and support exam preparation. Choose a topic below to get started.
1. |
If xi=total number of nonconformities in a sample of ni inspection units, and there are N samples of different sample size, and x varies according to a Poisson distribution, what will be the value of center line of the u-chart? |
A. | ( bar{u} = frac{ sum_{i=1}^N frac{2x_i}{n_i}}{N} ) |
B. | ( bar{u} = frac{ sum_{i=1}^N frac{x_i}{2n_i}}{2N} ) |
C. | ( bar{u} = frac{ sum_{i=1}^N frac{x_i}{n_i}}{N} ) |
D. | ( bar{u} = frac{ sum_{i=1}^N frac{x_i}{n_i}}{2N} ) |
Answer» D. ( bar{u} = frac{ sum_{i=1}^N frac{x_i}{n_i}}{2N} ) | |
2. |
The control chart used to inspect the process state by using the average number of nonconformities per unit data, is called _______________ |
A. | u-chart |
B. | c-chart |
C. | p-chart |
D. | R-chart |
Answer» B. c-chart | |
3. |
With c-chart, which of these is used to analyze nonconformity data? |
A. | X bar charts |
B. | R charts |
C. | Cause and Effect diagram |
D. | Tolerance Diagram |
Answer» D. Tolerance Diagram | |
4. |
For =13.11, what will be the value of LCL for the c-chart? |
A. | 23.97 |
B. | 10.86 |
C. | 8.84 |
D. | 2.24 |
Answer» E. | |
5. |
If the average number of nonconformities in a preliminary sample of a process is 19.67, which of these represents the value of UCL for a c-chart for this process output? |
A. | 19.67 |
B. | 6.37 |
C. | 32.97 |
D. | 25.77 |
Answer» D. 25.77 | |
6. |
When there is no standard given, the value of LCL for the c-chart is given by ___________ |
A. | LCL= ( bar{c}-3 sqrt{ bar{c}} ) |
B. | LCL= ( bar{c}+2 sqrt{ bar{c}} ) |
C. | LCL= ( bar{c}-2 sqrt{ bar{c}} ) |
D. | LCL= ( bar{c}+3 sqrt{ bar{c}} ) |
Answer» E. | |
7. |
The center line for the control chart for nonconformities is representing the value equal c, which is ____________ |
A. | The total number of nonconformities |
B. | The average number of conformities in a preliminary sample |
C. | The total number of nonconforming products |
D. | The total number of conforming products |
Answer» C. The total number of nonconforming products | |
8. |
The c-control chart is plotted for _____________ |
A. | Fraction nonconforming |
B. | Number of nonconformities per unit |
C. | Number of defects observed |
D. | Deviation from median of the defects in samples |
Answer» D. Deviation from median of the defects in samples | |
9. |
A nonconforming item has at least ____________ conformities. |
A. | 4 |
B. | 3 |
C. | 1 |
D. | 2 |
Answer» D. 2 | |
10. |
The event of a specification not satisfied at one point of a product, is called ____________ |
A. | Nonconformity |
B. | Non-defectiveness |
C. | Un-specification |
D. | Non-specification |
Answer» B. Non-defectiveness | |